FRESNO, Calif. - Police say a parolee who killed two people and wounded two others at a chicken processing plant in California moved methodically between three of the victims, putting a handgun against their head or neck and opening fire.

Fresno Police Chief Jerry Dyer said the victims did not hear the suspect, 42-year-old Lawrence Jones, on Tuesday because the processing plant was loud and at least some of them had noise protectors.

The fourth victim, a woman, was shot as she tried to flee the plant.

Dyer says Jones tried to shoot a fifth person, but he was out of bullets. Police believe he died a short time later of a self-inflicted gunshot wound.